If you've had any of these STDs of the mouth in the past and received treatment for them, it's possible for you to contract the same or a different disease again if you have sexual contact with an infected partner. Oral herpes can remain dormant for some time and become active again down the line, particularly in patients who have weakened immune systems.
The key ways to help prevent oral STIs are to always communicate with potential partners before sexual activity, visit your doctor to get checked for STIs and get treatment immediately if you notice symptoms. Your dentist is just one member of your healthcare team committed to keeping you safe and healthy!